La„Ni,Fe…O3 Stability in the Presence of Chromia - A Solid-State Reactivity Study

Stodolny, M.K. and Boukamp, B.A. and Blank, D.H.A. and Berkel van, F.P.F. (2011) La„Ni,Fe…O3 Stability in the Presence of Chromia - A Solid-State Reactivity Study. Journal of the Electrochemical Society, 158 (2). B112-B116. ISSN 0013-4651

PDF
Restricted to UT campus only: Request a copy
436Kb

Abstract:	The perovskite $La(Ni_{0.6}Fe_{0.4})O_3$ (LNF) is a candidate material for the electrochemically active cathode layer, the cathode current collecting layer, and/or the interconnect protective coating in intermediate temperature solid oxide fuel cells (IT-SOFCs) operated at . Since these operating temperatures enable the use of relatively cheap interconnect materials such as chromia-forming ferritic stainless steel, investigation of the chemical stability of LNF in the presence of chromium species is of importance. This study demonstrates that LNF is chemically unstable at when it is in direct contact with $Cr_2O_3$ . It has been observed that Cr enters the perovskite phase, replacing first Ni and then Fe, already after 200h. At 600°C, however, only minor reaction products were detected after 1000h exposure to $Cr_2O_3$ . Although this is a promising result, long-term testing under fuel cell operating conditions at 600°C is needed to prove that LNF is a viable IT-SOFC material.
Item Type:	Article
Copyright:	© 2011 The Electrochemical Society
Faculty:	Science and Technology (TNW)
Research Group:	Inorganic Materials Science (IMS)
Link to this item:	http://purl.utwente.nl/publications/81918
Official URL:	http://dx.doi.org/10.1149/1.3519369
Export this item as:	BibTeX EndNote HTML Citation Reference Manager

Show download statistics for this publication

Repository Staff Only: item control page

Metis ID: 280135